Finding the Fourth Proportional to 9,648.39, 13,311.84 and 5,399.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,648.39 : 13,311.84 = 5,399.01 : x
2. Step 2: Convert to fraction form
   9,648.39/13,311.84 = 5,399.01/x
3. Step 3: Cross multiply
   9,648.39x = 13,311.84 × 5,399.01
4. Step 4: Simplify right side
   9,648.39x = 71,870,757.28
5. Step 5: Solve for x
   x = 71,870,757.28/9,648.39
6. Step 6: Final answer
   x = 7,448.99